high hematocrit levelselevated hematocrithigh hematocrit levels indicatehemoglobin and hematocrit levels highpolycythemia hematocrit levelsslightly elevated hematocritelevated hemoglobin and hematocritelevated hematocrit dehydrationelevated hct levelscauses of high hematocritelevated rbc and hematocritcauses of increased hematocrit